Surname Гаил (Gail 
, Gayl , Гаил 
) , worldwide, is quite a common cognomen. The cognomen Гаил is habitual in Trinidad and Tobago, where it is quite a rare surname, United Arab Emirates, and Germany. In absolute terms, it is the most numerous in the United States, Germany, and France. Much more frequently, Гаил is the forename as well as the last name.